The animated series, X-Men: Evolution is based on younger versions of characters from Marvel's long running X-Men comics.
To put some of the more popular characters into a high-school setting, things like the ages of characters and their relationships to each other were changed from the comics.

The comic book character, Nightcrawler is very similar to his counterpart on X-Men: Evolution with some notable differences.

Appearance
The biggest difference in how Kurt appears in the comics is his feet. His feet are smaller, not as cat-like, and he has 2 toes in the front of each foot and one toe in the back.
In the comics, Nightcrawler is older (somewhere between 25 and 30), and has a larger build. He is a world-class gymnast so he is very lean but quite muscular.
His hair is very curly and he usually wears it rather short compared to Kurt in X-Men: Evolution.
Usually, you cannot see Kurt's pupils at all, so his eyes appear to be solid yellow.

Personality
Because Kurt in the comics is older, he has more confidence than in X-Men: Evolution. He is less shy, has grown comfortable with his appearance and does not usually use an image inducer (the comic book version of the "holowatch") unless it is absolutely necessary.
He still acts like a comedian sometimes, but is also highly responsible and has even lead his own team. He enjoys making others laugh, but is also the mature voice of reason in many situations.
Kurt has long had a strong faith in God, and even tried a short career as a Catholic priest.

Powers

Teleportation
In the comics, Nightcrawler's teleportation is shown with a large puff of purple smoke and a "BAMF!" noise that has become his trademark.
Usually, he can only teleport a distance of about 3 miles at a time.
There is a limit to how much he can carry with him when he teleports, and there is a great strain in bringing additional people and things with him. In the comics, when people teleport with Nightcrawler, they feel sick and can even pass out. Kurt has sometimes used this to his advantage by repeatedly teleporting an enemy until that person looses consciousness.

Shadow-blending
In the comics, Kurt always appears to be in shadow even if he is actually under direct sunlight. When it is dark, Kurt blends into shadows and can almost become invisible.

Nightcrawler's Teleporting Dimension
In the past, the comics have not shown much of the dimension Kurt travels through when he teleports. It occupied by a an old race of demonic-looking mutants that Kurt is decended from. It has a breathable atmosphere, though it smells sulfuric. Time passes differently in this dimension.

The dinosaur-like creatures from the episode "Shadow Dance" have never appeared in the comics.

Origin
In the episode Shadowed Past we see that Mystique dropped baby Kurt into a river by accident while fleeing from Magneto. However in the comic, there's no indication that Magneto was involved.

Nightcrawler came to join the X-Men very differently in the comics than in Evolution.
He was raised in a German circus, and grew up to be an acrobat.
Kurt left the circus as an young adult, when it was bought by a man who wanted to put Kurt in the freak show. Kurt came to a small German town where the people believed he was a demon and tried to hunt him down and kill him. They almost staked him through the heart, when Professor Xavier used his telepathy to stop them.
Xavier asked Kurt to join the X-Men and Kurt agreed in a desire to improve himself.

Relationships

Charles Xavier
Nightcrawler in the comicbooks shares a close, student/mentor relationship with Xavier much as he does in X-Men: Evolution. However, since Kurt was an adult when they met, Xavier is not as authoritative. Kurt has great gratitude and respect for the Professor and wants to make him proud, but is not as afraid of letting him down.

Wolverine
Nightcrawler and Wolverine both joined the X-Men at the same time as adults, so they do not have a relationship as student and teacher, but as equals. They became beer-drinking buddies and developed a very close friendship and mutual respect for one another. Kurt is one of the only people who can question Logan's actions without making him angry, and pretty much the only one who can make him laugh. Wolverine has even taken orders from Nightcrawler during times when Kurt was acting as team leader.

Shadowcat
In the comics, there is a larger age difference between Kurt and Kitty. Kurt was 20 when Kitty joined the team at the age of 13. Much like in the show, Kitty was put off by Kurt's appearance at first, but Kurt was only hurt in a general sense, not because he had a crush on her. Kitty eventually got over her aversion to Kurt's appearance and the two developed an almost brother/sister kind of friendship. Kurt is very protective of Kitty and calls her his "Kätzchen."

Note: This is for the benefit of people who have seen X-Men: Evolution but are not at all familiar with the comic.

It was interesting to see Kurt with the image inducer in the 70's Uncanny books. Changing into all sorts of movie stars:LOL But I'm thankful he doesn't use it anymore for the simple reason we get to see more of his sexy blueness;)

Originally posted by Bamfette
he is not a starring character of New or X-Treme tho.

Sadly, yes...I have around eleven issues and he only appears on the cover of one, but it was a huge collage of all the chracters and all you see is a headshot, and in another pic of all the characters in the same issue. Stinks, really.

~Siona

You cannot stop me. You cannot destroy me. For I am the cockroach of looove.

mmm, Evo Kurt is ok. I don't really like the fact that he's such a coward, but as previously said by Garble, maybe he grew in confidence as he got older.
Also the voice. It's very squeaky and high-pitched, but maybe, like some kind of bacteria, it grows on people. It certainly has on me.

Can you hear me?
Are you near me?
Can we pretend, to leave and then
We'll meet again
When both our cars collide

and he works surpisingly well in all sorts of ships in fanfiction. other than that i find him, in evo, childish and annoying, and Kurt without the religious element...is just no kurt at all! the comics rock. and comic kurt rocks: he swashes and buckles AND has such dignity.

Lol. I'm waaay too young for him. I don't care, he's still hot. I don't have to be his age to know he's hot.

~Def.

"A dedicated follower of nothing." -- graffitit artist in Brick Lane, London, England.
Right across the lane from the demon and just down the wall from Wolverine.

RIP Kurt Wagner. You were the character who brought in me into comics, who introduced me and inspired me. Now your death has sent me away again. Wherever you are in the Marvel Universe, I hope its someplace pleasant.

steyn wrote:oh pshaw, just wait a couple years, you'll catch up to his age in the comics. That's the thing about most comic characters, they don't age

That's the problem. I'll be an old grey-haired lady and he'll still be young, fit, and athletic!

~Def.

"A dedicated follower of nothing." -- graffitit artist in Brick Lane, London, England.
Right across the lane from the demon and just down the wall from Wolverine.

RIP Kurt Wagner. You were the character who brought in me into comics, who introduced me and inspired me. Now your death has sent me away again. Wherever you are in the Marvel Universe, I hope its someplace pleasant.

Yeah, if you like younger men. . . I can't stand em'! But I agree with Amber-Night (just Amber, then?). I think he is like BAMF! in the movies. I completely lost myself in hes all around beauty and mystery.

Let no one who loves be unhappy, even love unreturned has its rainbow. ~ J. M. Barrie

I have a few questions about the comics that might be kind of irrelevant, but I didn't know where else to post them:

1) What issue is Uncanny X-men on? Like,whats the curent issue and how often does a new one appear?
2) Are there any other spinoffs other than Ultimate, Astonishing, Ultimatum, Evolution, Unlimited, and Classic? I heard theres one called just X-men?
3) What's the current issue for Astonishing X-men, i guess Volume 3?